The production of C-2 hydrocarbons and H-2 from methane was studied in a proton conducting cell-reactor, at 973-1153 K and atmospheric pressure. Under open-circuit, the La0.6Sr0.4Co0.8Fe0.2O3 (LSCF) catalyst (anode) was found to be active towards both, H-2 and C-2 formation. Under closed-circuit, when protons were "pumped" away from the catalyst, an increase in C-2's and H-2 production was observed. The fraction of produced H-2 that was transported to the cathode reached values as high as 95%. In the fuel cell operation mode and at the maximum power output, the C-2 formation rate exceeded the open circuit rate by up to 20%. (C) 2012 Elsevier B.V. All rights reserved.